AW: Lin/exp control

[Haible Juergen]

	>Yeah, V/oct oscillators do get boring in the long run. :-)

Yes, I admit, that's one reason, too (:->)

	>Anyhow, I've also experimented with some linear stuff -- most
	>recently with a Yamaha-style oscillator. I've posted a (quick)
	>scan of the voltage-to-current converter at

> http://www.netcontrol.fi/~jocke/circuits/v2i.gif
> 
	[...]

	>The FT input
	>has R, 2R, 4R, and 8R resistors (R = 5kohm, typ.) switchable
	>to ground for octave selection. 

Looks nice. Such low resistor values would have advantages, too.
(You have lot of scope to increase the resistor for LFO range,
for example.)
I wonder if linearity is affected with relative high current thru the
differential pair. Have you checked if the current distribution
thru the pair is stable in the upper ranges ?

(It's just a question - I have no idea if it would be a problem or not.
My guess would be that even the MS-20 scheme would need some
HFT trimming if it wasn't for the rather low currents thru the pair.
They have a 100k resistor for the 2' range ! ) 

	JH.